Nickmaster

I feel like quitting karate.I just can't stay motivated.Sparring scares the crap out of me.I'm having family issues,not to mention school and band and the rest of the stuff in my life going on to. But If I quit,I feel guilty that I've been avoiding classes to make time for homework and just because I didn't want to go.I don't want the image of me being a quitter and a coward to haunt me for the rest of my life. Please,any help,or motivation?Anything?